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DATE: 01/23/2006                         COMPTROLLER OF PUBLIC ACCOUNTS - PROPERTY TAX DIVISION                         PAGE:      1
TIME: 11:30:02                                       2005 CONFIDENCE INTERVAL DETAIL                                    REPT: PTS428
                                                              177/Nolan                                                 VRSN:      W
                                                        177-903/Blackwell ISD
____________________________________________________________________________________________________________________________________
    (1)           (1)                (1)              (1)                (1)              (2)            (3)
 # STRATUM     CATEGORY          LOCAL VALUE     STRATUM RATIO       STATE VALUE     SAMPLE SIZE    TOTAL PARCELS   STRATUM VARIANCE
 _________     ________          ___________     _____________       ___________     ___________    _____________   ________________

      1           A                2,666,382        0.8701             3,064,455               7              171         .035380279
      2           A                2,686,495        1.0545             2,547,648               6               90         .031629914
      3           A                2,679,023        0.9906             2,704,445               8               55         .017401613
      4           A                2,599,877        1.1033             2,356,455               7               31         .021914647
      5           D3              16,948,133        1.0199            16,617,446              19            1,828         .015368408
      6           G1              14,357,869        1.0062            14,269,399               6               56         .019210824
      7           G1              14,156,724        1.0369            13,652,931               5               17         .003074688
      8           G1              16,644,070        1.0139            16,415,889               4                7         .000262686
  RANDOM TOTALS:                  72,738,573                          71,628,668              62            2,255
  CATG J  EXCEPTION VALUES:       10,291,067                           8,560,558
  CATG D1 EXCEPTION VALUES:       10,152,135                          12,030,239
  CATG G1 EXCEPTION VALUES:       10,977,590                          11,046,909
 TOTAL TEST VALUES (4):          104,159,365                         103,266,374
 MARGIN OF ERROR PERCENT:          5.0000003
 MARGIN OF ERROR VALUE:            5,163,319
 CONFIDENCE INTERVAL VALUES (5):
   STATE LOWER LIMIT:             98,103,055 (STATE TEST VALUE MINUS MARGIN OF ERROR PERCENT)
   LOCAL TEST VALUE:             104,159,365 (WITHIN CONFIDENCE INTERVAL)
   STATE UPPER LIMIT:            108,429,693 (STATE TEST VALUE PLUS MARGIN OF ERROR PERCENT)
 VALUE ASSIGNED (6):             159,020,089 (SEE ISD SUMMARY WORKSHEET)

 SOURCES:
 (1) SEE STRATIFIED CATEGORY WORKSHEET REPORTS PTS236, PTS430
 (2) NUMBER OF PARCELS SAMPLED BY STAFF
 (3) TOTAL CATEGORY PARCELS FROM STRATIFICATION REPORT APPRAISAL ROLL, OR SELF-REPORT
 (4) INCLUDES ANY PARCELS IN A, B, C, D3, F1, G1, G2,OR L1 MARKED AS EXCEPTION PROPERTIES
 (5) UNSTUDIED CATEGORIES AND SUB-CATEGORIES WERE NOT INCLUDED IN THE CONFIDENCE INTERVAL VALUES